Determine if R is older (return -1), or not (return 0 if equal, or 1 if newer) than a given version number.
compare_r_version(version)
compareRVersion(version)
-1 if R is older, 0 if equal, 1 if newer. Take care: if you specify version as "2.11", and R is version "2.11.0", then the function will return 1 (newer)!
compare_r_version("2.11.0") # Note that we strongly advise to use R > 2.11.0!
#> [1] 1